- the silky or fibrous case which the larvae of certain insects spin about themselves for shelter during the pupa stage
- any protective cover like this, as the egg capsule of certain spiders, leeches, etc.
- any cover used to waterproof or protect something, esp. military equipment for transport or storage
Origin of cocoonFrench cocon from Provençal coucoun, egg shell, diminutive of coca, shell-like container from Medieval Latin coco, shell, hull
- to enclose protectively, as in a cocoon
- to isolate (oneself)